contextIntegerFunctions.pl - adds integer related functions C.

From WeBWorK

This is a Parser context that adds integer related functions C(n,r)
and P(n,r). They can be used by the problem author and also by
students if the answer checking is done by Parser. The latter is
the main purpose of this file.

Note: by default, webwork problems do not permit students to use
C(n,r) and P(n,r) functions. Problems which do permit this
should alert the student in their text.